Improvement in steam-generators



nitrb tetes tttent @fitte Letters Patent No. 82,198, dated September 15,'1868.

IMPROVEMENT IN STEAM-GENERATORS.

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TO ALL WI-IOM IT MAY CONCERN:

Be it known that we, AUGUSTE LEON Bnzv and IsIDonE Annan Dnsxonns, of Paris, France, have invented certain Improvement in Steam-Boilers; and we do hereby 'declare the following to be a. full, clear, and exact description of the same. Y

Our invention relates to certain -arrangements, fully described hereafter, of the tubes and casings of a steam-boiler, whereby a constant and rapid circulation of the water is maintained, and the removal or replacing of the tubes or other parts within the boiler is facilitated.

In order to enable others skilled in the art to make and usc our invention, we will new proceed to describe its construction and operation, reference being had to -the accompanying drawing, which forms a part of this specication, and in whieh- Figure 1 is a sectional elevation of a boiler with ourimprovements.

Figure 2, a sectional elevation on the line 1-2, iig. 1.

Figure 3, a section on the line 3-4, iig. A1.

Figure 4, a. sectional elevation of an upright boiler with our improvements.

Figure 5, a. sectional plan of iig. 4.

Figure 6, a sectional elevation of amarine boiler with our improvements; and

Figure 7 a section on the line 5-6, g. 6.

A is the inner and B the outer casing o1' shell of a steam-boiler, the inner casing communicating with a fireplace and with a liuc inthe usual manner, and the outer casing enclosing the iirepla'ce, and thus forming water-spaces'at the sides of the latter. i

When the easings are horizontal, as shown in figs. 5 and 6, the inner casings arranged ecccntrcally to theouter shell, so that the water-space at one side ofthe inner casing shall be wider than the other, for a purpose described hereafter.

The Water-tubes T, in the present instance, extend from end to end of the casing A, and are inclined, the

highest ends being over the fireplace; and in the shell B, opposite the inner ends ofthe tubes, isan opening or man-hole, to which is fit-ted a detachable cover, G. i l

Inasmuch as the Water-space at one side of the inner casing is wider thanY at the other, the water will be unequally heated, and a rapid and constant circulation round the inner casing will be maintained, while, owing to the inclination of the tubes T, the Water will flow constantlyr through them in one direction, so that it is caused to pass continually and quickly from one end of the boiler to the other, an increase in the diameter of the tubes facilitating this flow. l

Owing to the currents which result from thc above-described arrangement of the casings and tubes, the deposit of sediment and formation of scale is eifectually prevented, while the water is more rapidlyheated, and with less heating-surface than in boilers of the ordinary construction.

The application of our improvements to marineboilers is represented in iigs. 6 and 7, and to upright boilers in figs. 4 and 5. In boilers of the latter construction the outer shell is represented as in two partsLB B', which are connected by bolts passing through {langes a on the adjacent edges. The cap or-crown oi" the outer shell is secured by screwbolts to a flange on a chimney, extending from the innercasing, so that by removing these bolts, and those in the iianges a, the upper portion of the shell may be detached, and access may be had to the pipes or inner casing, to clean or repair the same.

We claim as our invention, and desire to secure by Letters Patentl. The arrangement of the inner and outer Casin-gs of a steam-boiler ecccntrically to each other, for the purpose set forth. v

2. A boiler, the outer shell of which consists of two or moreilanged sections, constructed andV so secured together by screw-bolts as to be detachable from each other, substantially as herein set forth for thvpurpose described.

' In testimony whereof, we have signed our names to this specification in the presence of tvro subscribing Witnesses.

BEZY, DESNOYER'S.

Witnesses E.v RIcHAnD, JAMES HAND.

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